Anesthetic vaporizer

Abstract

An anesthetic vaporizer with a vaporizer chamber into which leads a gas inlet channel for fresh gas and which is connected via an outlet channel with a proportioning unit containing setting means for the anesthetic concentration to be released to the fresh gas is to be improved in such a way that exchanging the various anesthetics is made possible to only a single proportioning unit. The vaporizer chamber is a self-enclosed housing part to be coupled to the proportioning unit via connectors and the setting means are adjustable to the release of the respective anesthetic used.

What is claimed is: 
     
       1. An anesthetic vaporizer, comprising a vaporizer housing having an interior liquid anesthetic reservoir, an intermediate plate closing said housing having a plurality of receiving openings, a proportioning unit having fluid transmitting projections of corresponding numbers as the openings, said fluid transmitting projections being positionedd to engage into the openings upon joining of the proportioning unit to the vaporizer housing, a flow passage being defined from a gas inlet to said reservoir through said fluid transmitting projection to a flow passage extending back into said proportioning unit, and a gas setting unit in said proportioning unit adapted to the release of the respective anesthetic used, marking means engaging into the proportioning unit for adaption of the setting means in said unit, said marking means being in the form of a marking pin and said gas setting means including a scale means for providing an indication of the anesthetic, operatively connected in said proportioning unit so as to be displaceable in an axial direction. 
     
     
       2. An anesthetic vaporizer according to claim 1, wherein said openings and said projections provide a valve passage including an inlet for the inlet flow of the anesthetic and an outflow for the outflow of the anesthetic. 
     
     
       3. An anesthetic vaporizer according to claim 2, wherein said valve elements comprise ball valves, and spring means urging said ball valves in a closing direction aganist valve seat. 
     
     
       4. An anesthetic vaporizer, comprising: a vaporizer housing having an interior liquid anesthetic reservoir; an intermediate plate closing said housing having a plurality of receiving openings; a proportioning unit having fluid transmitting projections of corresponding numbers as the openings, said fluid transmitting projections being positioned to engage into the openings upon joining of the proportioning unit to the vaporizer housing; a flow passage being defined from a gas inlet, associated with said housing, to said reservoir through said fluid transmitting projections to a flow passage extending back into said proportioning unit; a gas setting unit in said proportioning unit adapted to the release of the respective anesthetic used; a temperature dependent control system, in said proportioning unit, said temperature dependent control system including a heat conduction element in said vaporizing housing, in intimate contact with said intermediate plate. 
     
     
       5. An anesthetic vaporizer, comprising: a vaporizer housing having an interior liquid anesthetic reservoir; an intermediate plate closing said housing having a plurality of receiving openings, a proportioning unit having fluid transmitting projections of corresponding numbers as the openings, said fluid transmitting projections being positioned to engage into the openings upon joining of the proportioning unit to the vaporizer housing; a flow passage being defined from a gas inlet to said reservoir through said fluid transmitting projections to a flow passage extending back into said proportioning unit; a gas setting unit in said proportioning unit adapted to the release of the respective anesthetic used; and, an electrically controlled temperature dependent control system being formed as part of said proportioning unit and including a temperature sensor protruding into the vaporizer chamber and being connected with a proportioning unit via an electrical point of separation.